CONTROLLED PARTICLE SIZE DISTRIBUTION Russian patent published in 2021 - IPC C08F12/08 C08F2/18 C08F20/10 C08F20/68 C08L33/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a set of polymer granules, where the volume distribution, expressed as a function of the granule diameter, provides the first peak(A1), characterized by a maximum PM1 with a diameter PD1 and characterized by a full width at half the maximum of 75 mcm or less, the second peak(A2), characterized by a maximum PM2 with a diameter PD2 and characterized by a full width at half the maximum of 75 mcm or less, and the minimum point (B1) characterized by the minimum value VM1 with a diameter ranging from PD1 to PD2, where VM1 is less than 0.25*PM1 and VM1 is also less than 0.25*PM2. PD1 and PD2 differ by 25 mcm or more. The aggregate of polymer granules is characterized by an average volume sphericity Ψ, ranging from 0.9 to 1.0. In addition, the polymer granules contain polymerized links of one or more monofunctional vinyl monomers and one or more multifunctional vinyl monomers. The amount of monofunctional vinyl monomer by weight in terms of the weight of all monomers is 75% or more. The amount of multifunctional vinyl monomer by weight in terms of the weight of all monomers is from 5% to 25%.

EFFECT: controlled particle size distribution.

6 cl, 6 dwg, 3 ex